Refers to the period in history and style of art that developed when Rome was ruled by the Republic, from its founding in 509 BCE through the Battle of Actium in 31 BCE or the formal establishment of the Empire in 27 BCE. Art produced during this period reflects the political power, glories, and distinguished ancestors of the ruling families, resulting in many portraits and historical reliefs. The style is characterized by the influence of Classical Greek art and an emphasis on extreme realism.